TOI-4582 b
Astrophysical Synthesis & Habitability Characterization
TOI-4582 b is a confirmed gas giant exoplanet orbiting the star TOI-4582, located approximately 1251.9 light-years (383.85 parsecs) from the Solar System. First announced in 2023 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.1493% across the stellar disk), this world measures 10.536 Earth radii (0.94 Jupiter radii) and has a measured mass of 168.449 Earth masses (0.53 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.79 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.52 g⊕ (14.91 m/s²), and an escape velocity of 44.7 km/s.
In its orbital architecture around TOI-4582, TOI-4582 b completes one full revolution every 31.034 Earth days. The planet follows a highly eccentric trajectory (e = 0.51), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 615 K (+342°C / +648°F) and receiving 33.73 S⊕ (~45,912 W/m²), TOI-4582 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4582 is classified as a stellar host with an effective photospheric temperature of 5,190 K, a radius of 2.5 R☉, a mass of 1.34 M☉, an estimated bolometric luminosity of 4.069 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.17 dex (metal-rich relative to the Sun). From Earth, TOI-4582 shines at apparent V-band magnitude 11.27 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: Transiting Exoplanet Survey Satellite (TESS) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TOI-4582 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,190 K |
| Stellar Radius | 2.5000 R☉ |
| Stellar Mass | 1.3400 M☉ |
| Bolometric Luminosity | 4.069 L☉ |
| Metallicity [Fe/H] | 0.170 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 11.270 · G: 11.081 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 31.034 days |
| Orbital Eccentricity (e) | 0.51000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.79 g/cm³ (44.7 km/s vesc) |
| Insolation Flux | 33.7343 S⊕ (~45,912 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1251.900 LY (383.846 pc) |